While her husband Roger Federer was making headlines with his defection from clothing sponsor Nike to Uniqlo after 24 years, Mirka Federer was turning heads with a divisive outfit on the first day of Wimbledon 2018.

Mirka Federer aces the WImbledon WAG look with serious bling.

On Monday, the former world No.76 herded her two sets of twins – daughters Charlene and Myla, 8, and boys Lenny and Leo, 4 – into the players’ box for their famous father’s first match in an oufit that served up Wimbledon’s first fashion surprise.

Mrs Federer, 40, teamed a blue and white striped shirt with mirror sunglasses, tiny frayed white shorts and a $950 Gucci elastic striped belt with giant crystal butterfly buckle.

The sport-meets-Swarovski belt has already sold out on luxe US site Neiman Marcus.

Her bling overload – teamed with her engagement ring – lit up social media:

https://twitter.com/olivia_watt/status/1013878694501343232

It’s not the first time Mrs Federer has made a statement with tennis Gucci.

At the 2017 Australian Open, she divided social media with a $1975 bright pink and green jumper from the Italian fashion house, which featured an applique tiger and the words (in French) “Blinded by love”.

Mirka Federer’s controversial Gucci jumper at the 2017 Australian Open.

This time around, one Twitter user suggested Mrs Federer bought her new belt with money from her husband’s freshly-inked deal with the Japanese casual wear designer.

Federer’s new contract is reportedly worth $408 million over the next 10 years and was signed after his deal with Nike expired in March.

The 36-year-old Swiss star, gunning for his ninth Wimbledon title, wore Uniqlo for his match on Monday but for now, kept his Nike shoes.

In return, they have kept his RF initials but “will come to me at some point”, he said.

“They are my initials.”

His new look was almost identical to his signature Nike styling: thick tied headband, box-perfect collared shirt and slimline shorts.

Roger Federer in action on July 2 in his new Uniqlo gear.

The double-header Federer controversy was the major fashion talking point on a day when players honoured the traditional all-white code and celebrities wore their summery best – fedoras, pastel suits for men, sundresses – to watch matches.

For women players, visors, high buns and flippy dresses or skirts with racer back tops were a thing. Serena Williams switched up the “empowering” black catsuit she wore for the French Open to a long-sleeved skater dress.

Serena Williams.

Former world No. 1 Caroline Wozniacki’s dress featured high fashion waffle and punched hole details.

Caroline Wozniacki.

Australia’s Ajla Tomljanovic totally got the dress code memo, but her dress was more body-con than most.

Ajla Tomljanovic.

Parked in the royal box courtesy of being a friend of the Duke and Duchess of Cambridge, singer Ellie Goulding wore a printed mini-dress with Chinese-inspired detailing and a pair of chunky black sandals.

Ellie Goulding.

Wearing a chic pinstripe pantsuit with red camisole, Game of Thrones star Natalie Dormer brought the glamour. She started the day in the Stella Artois marquee before making her way to a courtside seat, drink in hand, gold sunglasses on head.

Natalie Dormer.